Apply clippy::impl_trait_in_params at crate-level

.github/.cspell/project-dictionary.txt

@@ -50,6 +50,7 @@ SIDREF
 significand
 specularity
 splitn
+taiki
 testline
 testmixed
 testpoints

Cargo.toml

@@ -48,7 +48,7 @@ members = [
     "examples/kiss3d",
 ]
 
-# This table is shared by projects under https://github.com/taiki-e.
+# This table is shared by projects under github.com/taiki-e.
 # It is not intended for manual editing.
 [workspace.lints.rust]
 improper_ctypes = "warn"

src/lib.rs

@@ -7,7 +7,13 @@
     )
 ))]
 #![forbid(unsafe_code)]
-#![warn(clippy::exhaustive_enums, clippy::exhaustive_structs)]
+#![warn(
+    // Lints that may help when writing public library.
+    // missing_docs, // TODO
+    clippy::exhaustive_enums,
+    clippy::exhaustive_structs,
+    clippy::impl_trait_in_params,
+)]
 #![allow(
     clippy::cast_lossless,
     clippy::inline_always,